 Icke believes that the only way this 'Archontic' influence can be defeated is if people wake up to 'the truth' and fill their hearts with love.Icke briefly introduced his ideas about ancient astronauts in "The Robot's Rebellion" (1994), citing Milton William Cooper's "Behold a Pale Horse" (1991), and expanded it in "And the Truth Shall Set You Free" (1995), citing Barbara Marciniak's "Bringers of the Dawn" (1992).Religious studies lecturer David G. Robertson writes that Icke's reptilian idea is adapted from Zecharia Sitchin's "The 12th Planet" (1976), combined with material from Credo Mutwa, a Zulu healer.